This error is telling you that the calculation in question has too many input key figures for it to successfully parse.
The calculation is related to node ID 5_111. There are ways to decipher which key figure this relates to by looking through the generated node tables in hana studio, but only if you have an on premises release.
In your activation log do you have other E (error) messages? Perhaps around the middle of the logs? I believe that related error message gives you the key figure ID.
Unfortunately the solution is to break up your desired calculation into two or more calcs.
Example:
If original was:
KF1 = A * B * C
then you could break it up like:
HKF1 = A * B
KF1 = HKF1 * C