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Looks to me like the compiler is reporting a syntax error in system_userinfo.html around line 112.
The "Notice [PHP]: Undefined index: xoops_lblocks in file " are nothing to worry about I am told
Try updating your "System" files in "Modules"
Templates are located under system/templates.
If no luck go to Templates (your default template has a tick against it) Look for "System" files, and click on "List", you will find system_userinfo.html in there. Click on "Edit"
Are you using the default template? You can not edit the default template, but you can clone it, and then edit it. Call it anything you like and make the clone your default template in general settings.
There is a bit in the wiki about templates and themes. You could practice by uploading the x2t theme, and then the "tar" file in the extras folder to make a new template, make this template the default in general settings, and then check if you have the same fault.