Introducing SiPM Array to an Op-Amp
There are several issues here.  

First, that amplifier circuit will not work.  You have 16 diode arrays in parallel, each with 4nF of input capacitance.  That is an enormous input capacitance, but you have almost no feedback capacitance.  You should be closer to 310pF, not 3pF.  See:  http://www.ti.com/lit/an/sboa055a/sboa055a.pdf

Second, you have have +/-5 volts powering your opamp.  If you are getting -30V from a -5v rail, something is very wrong.  Have you burned out your opamp and/or SIPM?  Or shorted something?  

Third, the datasheet you linked gives best practices for building transimpedance amplifiers using that op amp, including things like decoupling capacitors.  You aren't following them.  

Forth, the SIPM vendor has recommended circuits for biasing and decoupling the SIPM.  You aren't following those either:  https://www.onsemi.com/pub/Collateral/AND9782-D.PDF

I would start by verifying that the SIPM itself is still working by testing it with a scope and no amplifier.  I would then fix the bias circuit.  Finally, I would fix the amplifier circuit by adding the correct feedback capacitance and decoupling capacitors.

I wonder though if a transimpedance amplifier is the right thing to use here?  You are only getting 470 ohms transimpedance gain but using a detector with a gain of over 6 million.  What are you trying to do?