Hello, I followed all the instructions and apparently I could install fprint correctly. However when I run sudo ./img_capture I got an error message. Also is not possible to enroll and fprint_demo cannot fing any device.
I tried to look for the error 903 but the github page is no longer available
I'm running it in ubuntu 18.10 if that helps.
I hope anyone can help me out
The error message is:

(process:3360): libfprint-DEBUG: 20:49:10.427: 161437947: ../libfprint/fpi-core.c:743
(process:3360): libfprint-DEBUG: 20:49:10.432: registered driver upekts
(process:3360): libfprint-DEBUG: 20:49:10.432: registered driver upektc
(process:3360): libfprint-DEBUG: 20:49:10.432: registered driver upeksonly
(process:3360): libfprint-DEBUG: 20:49:10.432: registered driver vcom5s
(process:3360): libfprint-DEBUG: 20:49:10.432: registered driver uru4000
(process:3360): libfprint-DEBUG: 20:49:10.432: registered driver aes1610
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver aes1660
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver aes2501
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver aes2550
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver aes2660
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver aes3500
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver aes4000
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver vfs101
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver vfs301
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver vfs5011
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver upektc_img
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver etes603
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver vfs0050
(process:3360): libfprint-DEBUG: 20:49:10.433: registered driver elan
(process:3360): libfprint-DEBUG: 20:49:10.433: driver elan supports USB device 04f3:0c10
(process:3360): libfprint-DEBUG: 20:49:10.433: selected driver elan supports USB device 04f3:0c10
Found device claimed by ElanTech Fingerprint Sensor driver
(process:3360): libfprint-sync-DEBUG: 20:49:10.433: 161443813: ../libfprint/fpi-sync.c:57
(process:3360): libfprint-async-DEBUG: 20:49:10.433: 161443841: ../libfprint/fpi-async.c:77
(process:3360): libfprint-elan-DEBUG: 20:49:10.546: 161556427: ../libfprint/drivers/elan.c:801
(process:3360): libfprint-async-DEBUG: 20:49:10.546: status 0
(process:3360): libfprint-sync-DEBUG: 20:49:10.546: status 0
Opened device. It's now time to scan your finger.

(process:3360): libfprint-sync-DEBUG: 20:49:10.546: to be handled by elan
(process:3360): libfprint-async-DEBUG: 20:49:10.546: 161556723: ../libfprint/fpi-async.c:577
(process:3360): libfprint-DEBUG: 20:49:10.546: action 4
(process:3360): libfprint-elan-DEBUG: 20:49:10.546: 161556774: ../libfprint/drivers/elan.c:849
(process:3360): libfprint-elan-DEBUG: 20:49:10.546: 161556801: ../libfprint/drivers/elan.c:788
(process:3360): libfprint-elan-DEBUG: 20:49:10.546: 161556825: ../libfprint/drivers/elan.c:101
(process:3360): libfprint-drv-DEBUG: 20:49:10.546: 0x55677d4c12f0 entering state 0
(process:3360): libfprint-elan-DEBUG: 20:49:10.546: 161556880: ../libfprint/drivers/elan.c:732
(process:3360): libfprint-elan-DEBUG: 20:49:10.546: 4019
(process:3360): libfprint-elan-DEBUG: 20:49:10.546: 161557110: ../libfprint/drivers/elan.c:332
(process:3360): libfprint-elan-DEBUG: 20:49:10.546: 161557187: ../libfprint/drivers/elan.c:357
(process:3360): libfprint-elan-DEBUG: 20:49:10.546: 161557218: ../libfprint/drivers/elan.c:378
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 161557410: ../libfprint/drivers/elan.c:332
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 0138
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 161557524: ../libfprint/drivers/elan.c:320
(process:3360): libfprint-drv-DEBUG: 20:49:10.547: 0x55677d4c12f0 entering state 1
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 161557584: ../libfprint/drivers/elan.c:732
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: FW ver 0x0138
(process:3360): libfprint-drv-DEBUG: 20:49:10.547: 0x55677d4c12f0 entering state 2
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 161557659: ../libfprint/drivers/elan.c:732
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 000c
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 161557796: ../libfprint/drivers/elan.c:332
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 161557847: ../libfprint/drivers/elan.c:357
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 161557874: ../libfprint/drivers/elan.c:378
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 161558036: ../libfprint/drivers/elan.c:332
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 6000... (4 bytes)
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 161558145: ../libfprint/drivers/elan.c:320
(process:3360): libfprint-drv-DEBUG: 20:49:10.547: 0x55677d4c12f0 entering state 3
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 161558205: ../libfprint/drivers/elan.c:732
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: sensor dimensions, WxH: 96x96
(process:3360): libfprint-drv-DEBUG: 20:49:10.547: 0x55677d4c12f0 entering state 4
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 161558280: ../libfprint/drivers/elan.c:732
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 402a
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: skipping for this device
(process:3360): libfprint-elan-DEBUG: 20:49:10.547: 161558357: ../libfprint/drivers/elan.c:320
(process:3360): libfprint-drv-DEBUG: 20:49:10.547: 0x55677d4c12f0 completed with status 0
(process:3360): libfprint-elan-DEBUG: 20:49:10.548: 161558405: ../libfprint/drivers/elan.c:775
(process:3360): libfprint-DEBUG: 20:49:10.548: status 0
(process:3360): libfprint-async-DEBUG: 20:49:10.548: 161558457: ../libfprint/fpi-async.c:598
(process:3360): libfprint-elan-DEBUG: 20:49:10.548: 161558485: ../libfprint/drivers/elan.c:900

(process:3360): libfprint-poll-CRITICAL **: 20:49:10.548: fpi_timeout_add: assertion 'fpi_poll_is_setup()' failed

(process:3360): libfprint-poll-CRITICAL **: 20:49:10.548: fpi_timeout_set_name: assertion 'timeout != NULL' failed