Lỗi ts24 idata using method mysql_native_password failed năm 2024

I'm trying to move three Umbraco sites to a new hoster. I got the following error on all the sites while saving data into the database. The only thing I changed on the installation in the databaselogin en password. Everything else is the same.

The following parser error appears:

Authentication to host '' for user '' using method 'mysql_native_password' failed with message: Access denied for user ''@'vps19385.public.cloudvps.com' (using password: NO)

Source error: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.

The database connection is correct because I can read data and the sites are working perfectly. When I login on myLittleAdmin I can add data to the database, so I would say the user has read / write rights.

Some info:

2 sites are Umbraco 6.1.6 and 1 site Umbraco 7.1. It's running on .net framework 4.5.1 and I have CAS trust level set on Full.

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