Hello, Text of PM does show only this error, like this:

[[Template core/front/global/comment is throwing an error. This theme may be out of date. Run the support tool in the AdminCP to restore the default theme.]]

[[Template core/front/global/comment is throwing an error. This theme may be out of date. Run the support tool in the AdminCP to restore the default theme.]]

[[Template core/front/global/comment is throwing an error. This theme may be out of date. Run the support tool in the AdminCP to restore the default theme.]]

If you are self-hosted, just make a file edit:

 

Which file?

...system/Content/Comment.php

14 minutes ago, Adriano Faria said:

...system/Content/Comment.php

Thanks Adriano, it works......