'Error Unabled to add User controls to a form

I get these two error messages, when trying to add a User Control to a Form. Worked fine for long, no problems. Now the Design won't show the already added User Controls. Where is the problem? I've heard the Constructor must be untouched if possible and that is not the problem here.

Thanks in advance!

Error Message

Settings.settings

Referring to Settings property user

Second Error Message when no settings property used



Solution 1:[1]

Please Check the Settings Class because the user value is not retrieved. Check the value of user.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Hariharan Haridoss