Gitlab Credential Error

Hi.
Have been working on a project for over 3 months now, with regular Git commits.
Today it started throwing error: undefined suddenly.
Tried removing the project and cloning it again, but it won’t clone and show the same message.
When tried running with Logging, it collected below log:

[2022-05-17 17:37:30.607]  START projectsDataProvider
[2022-05-17 17:37:35.911] online version: 4.9.1
[2022-05-17 17:37:47.505] gitUrl=https://gitlab.com/xxx/xxx.git
[2022-05-17 17:37:47.507] clone repo
[2022-05-17 17:37:47.509] START getCredentials...tries=3
[2022-05-17 17:37:47.992] Trying to get credentials for https://gitlab.com/xxx/xxx.git using 
[2022-05-17 17:37:47.992] tries: 3
[2022-05-17 17:37:47.992] gitProviderName=gitlab
[2022-05-17 17:37:47.992] found access token - use it: xxxxxxxxxxxxxxxxxxxxxx
[2022-05-17 17:37:47.992] gitlab login...
[2022-05-17 17:37:48.346] Trying to get credentials for https://gitlab.com/xxx/xxx.git using 
[2022-05-17 17:37:48.346] tries: 2
[2022-05-17 17:37:48.346] gitProviderName=gitlab
[2022-05-17 17:37:48.346] found access token - use it: xxxxxxxxxxxxxxxxxxxxxxxx
[2022-05-17 17:37:48.346] gitlab login...
[2022-05-17 17:37:48.668] Trying to get credentials for https://gitlab.com/xxx/xxx.git using 
[2022-05-17 17:37:48.669] tries: 1
[2022-05-17 17:37:48.669] gitProviderName=gitlab
[2022-05-17 17:37:48.669] found access token - use it: xxxxxxxxxxxxxxxxxxxxx
[2022-05-17 17:37:48.669] gitlab login...
[2022-05-17 17:37:49.002] Trying to get credentials for https://gitlab.com/xxx/xxx.git using 
[2022-05-17 17:37:49.002] tries: 0
[2022-05-17 17:37:49.002] gitProviderName=gitlab
[2022-05-17 17:37:49.419] Invalid response 400
[2022-05-17 17:37:52.656] GOT appWindow close...

Please help. Have also tried removing Gitlab from settings & removing the Wappler app from Gitlab itself, but no luck.