The project you are trying to contribute to is currently undergoing maintenance, which has resulted in the temporary closure of translation contributions. This means that you won't be able to add or modify translations at this time. The system has automatically locked the translation feature to prevent any changes from being made until the maintenance is complete. You can find more details about the issue here, where it states that 'Repository could not be merged.' This is a common message when there are unresolved conflicts or issues in the repository that need to be addressed before it can be merged into the main codebase. You should wait until the maintenance is finished and the repository is back online before attempting to contribute translations again. In the meantime, you might consider reviewing the project's documentation or participating in discussions on the project's forums to stay updated and help out in other ways when the time is right.