Description:
Operating System: Windows 10 64-bit
MySQL Server 8.0.46 installed successfully.
MySQL Shell connection works successfully using:
\connect root@localhost
However, MySQL Workbench throws an unexpected error popup:
“Parameter is not valid”
Workbench opens, but database connection and schemas do not load properly.
Tried the following:
- Restarted MySQL service
- Ran Workbench as Administrator
- Deleted Workbench AppData cache/configuration
- Reconnected using localhost:3306
Expected Result:
Workbench should connect to the local MySQL database and load schemas normally.
Actual Result:
Workbench throws “Parameter is not valid” unexpected error popup and database UI does not load correctly.
How to repeat:
1. Install MySQL Server 8.0 and MySQL Workbench on Windows 10.
2. Open MySQL Workbench.
3. Click on “Local instance MySQL80”.
4. Workbench opens but throws an unexpected error popup.
5. Error message displayed: “Parameter is not valid”.
6. Database schemas and connection UI do not load properly.
7. Issue occurs every time Workbench is opened.
Suggested fix:
Please investigate the Workbench UI configuration or connection initialization process causing the “Parameter is not valid” exception.
Possible fixes:
- Improve validation handling for corrupted configuration/cache files
- Automatically reset invalid Workbench UI settings
- Prevent unexpected popup during connection loading
- Provide detailed stack trace or error logging for debugging
