I discovered something about invisible tabs. After turning off the Setting/User interface / 'Enable tab scrolling when many tabs are open' option, the tabs appear.

@imtranslator OK, and install imtranslator. Works. Thanks a lot.

@imtranslator

@imtranslator Thanks for answer, but i not have access to option.
Info form Opera extension manager: "Your extension was disabled because it is corrupted...."

Stop working with Opera 109.0.5089.0
Google Translate
Version 14.74 by imtranslator
This extension may have been corrupted.
After reinstallation still not working.