Running macOS El Capitan 10.11.6 I never ran into this issue.
Lately I've been testing through all intermediate versions from TB 45.x to actually TB 45.7.0, TB 51.0b2, Earlybird 53.0a2 and Daily 54.0a1.
I just re-tested TB 45.7.0 and TB 52.0a2 in new profiles, skipped adding account, modified some preferences, opened the "Chat" tab, then disabled Lightning and restarted TB.
At any given moment and on each restart, even if the "Chat" tab is active on restart, the "skip this" and the "configure my account later" buttons both do work and I'm able to either create an account or choose "configure my account later".
Running macOS El Capitan 10.11.6 I never ran into this issue.
Lately I've been testing through all intermediate versions from TB 45.x to actually TB 45.7.0, TB 51.0b2, Earlybird 53.0a2 and Daily 54.0a1.
I just re-tested TB 45.7.0 and TB 52.0a2 in new profiles, skipped adding account, modified some preferences, opened the "Chat" tab, then disabled Lightning and restarted TB.
At any given moment and on each restart, even if the "Chat" tab is active on restart, the "skip this" and the "configure my account later" buttons both do work and I'm able to either create an account or choose "configure my account later".