Invoice link problem

[NMH]

Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, .....etc. can someone help me in resolving this problem. thank you,

[kernowlass]

Not sure what we can do for you??

Why not contact the server admin as advised?

[NMH]

I did almost three hours ago but didn't receive any feed back! Thank you anyway.