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Your LimeSurvey version: 6.4
Own server or LimeSurvey hosting:
Survey theme/template:
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Hello,
Good Day

When i downloaded question themes from  gitlab.com/SondagesPro then try to import in question themes some show attached error, i also try to add compatibility 6 also getting error 
Please help how to to import these themes successful 

 

This is not a question theme, this is a plugin.
 

How to manually install these plugin in the cloud version

Hi,

Any updated on this

If you are on the cloud, you will need b to contact LimeSurvey support.

Unfortunately, the cloud version does not offer the core feature of uploading plugins (or other custom coded features). You have to contact support@limesurvey.org to request a plugin upload and to my knowledge they also charge for this service.
This limitation is the reason why for several projects we are supporting we are moving people to our hosting which offers all Limesurvey features and comes with no limits regarding the number of admins or responses. Check survey-consulting.com/hosting/ for more details.