Internal errors loading tps and calculations

[brson]

These show up in the rocket logs occassionally:

thread 'rocket-worker-thread' panicked at 'No tps data for chain okex: EOF while parsing a value at line 1 column 0', src/realtps_web/src/main.rs:51:14
thread 'rocket-worker-thread' panicked at 'No calculation log for chain polygon: EOF while parsing a value at line 1 column 0', src/realtps_web/src/main.rs:56:18