Signature invalid - Error during signature verification -signature seems to signed in future

Solution

This is a simple fix , all you have to do is change your date to 2 or 3 days backwards from current date



Step 1: change your date  2 or 3 days backward

Either double click on the time or 

right click on the time and select adjust time

Change the time two or three days backwards from current date
Example :if date is 5th then change it to  3rd or 2nd
Save the changes

Step 2: Right click on signature and validate the signature

it should be valid by now ,if it still remains signature invalid try changing the date  2 or 3 days  forward.
and validate again

It should be valid now