Op-Amp Input Common Voltage Range for specific gain
Your gain is set to 101, so you're expecting an output voltage of about 5V. If you look at the datasheet:

The output can only approach 5V for a very narrow range of common mode voltage.
If you give it a -5V rail it will be able to handle a much wider range of inputs for output near the positive rail, as shown in Fig. 32 &amp; 33.