Thanks for the report. However, reporting several different issues in one bug report is not helpful, it complicates tracking of the individual issues.
Regarding issue #1, can you run the following command in a terminal, wait for the chromium window to show, then close it, and share the output?
snap run --trace-exec chromium
Issue #2 is a known bug: bug #1800260.
Issue #3 can be safely ignored, the warning is harmless.
Thanks for the report. However, reporting several different issues in one bug report is not helpful, it complicates tracking of the individual issues.
Regarding issue #1, can you run the following command in a terminal, wait for the chromium window to show, then close it, and share the output?
snap run --trace-exec chromium
Issue #2 is a known bug: bug #1800260.
Issue #3 can be safely ignored, the warning is harmless.