Here's some sources:
- You can open the bug report dialog by using the key combination Ctrl+Z. Select the category your report fits best. If you are unsure, select "Other". Describe the issue you encountered as thoroughly as possible by providing steps that are necessary to reproduce it. Your character name as well as the coordinates of the map field on which your character stood when submitting the bug report will be sent automatically. The submission of your bug report will be confirmed with the message "Comment sent" in your game window and server log.
- To report map bugs, you can right-click on the concerned map field and select the entry "Report Coordinate" from the context menu. The coordinate you clicked on will be sent automatically with your report.
- Mistakes in NPC chats can be reported by right-clicking on the NPC text in question and selecting the context menu entry "Report Message". The NPC's name and line will then be sent automatically with your report.
Regarding reporting bugs the possibility of reporting more complex issues via ticket to customer support still remains Submit a ticket and select Technical Problems. If you don't want to log on to the website you can email Tibia at tech@cipsoft.com
https://www.tibiaqa.com/24888/how-to-report-a-bug-in-the-game?show=24888#q24888
Here's additional info on tickets: You can log into your account and open a support ticket. Please select the category in which your problem fits best: Select "Technical Problems" if you have connection problems, want to report a bug, have questions about the game content, or have a problem with the client. Select "Payments" for problems with Tibia Coins, if you have questions about the ordering process, if your payment has not arrived or if you need a refund. Select "General" for all problems not fitting in one of the other two categories
https://www.tibia.com/gameguides/?subtopic=manual§ion=support#:~:text=To%20do%20so%2C%20please%20log,a%20problem%20with%20the%20client.