OCR service failed to process the document

Since the your maintenance today we're encountering an OCR issue:

Details:
Image dimension: 46x41
Size: 755 bytes
Hash: 363b161c3a2f0e4d1c3dc9ca5607c401
Request execution time: 469 ms
Server: https://ocr.api.dev.smartbear.com
Status code: 500 (Internal Server Error.)
Error message: remaining connection slots are reserved for non-replication superuser connections.

Does anybody have the same problem? Is it a server issue?