Embedded Python Error?

I recently compiled Sigil 0.9.6 on Mint 18 64-bit (Mate). Everything seemed to go smoothly, but after Sigil had been installed, I tried to start it and got these errors:

1. Embedded Python Error
2. error in xmlprocessor repairXML: -2

These two errors alternate and each of them pop up 5-10 times before I briefly see the Sigil window, which then closes itself.

What might be wrong and is the error fixable?

Thanks.