B4R Question esp8266 OTA updater error: -1 HTTP error: connection failed

[peacemaker]

HI, All

How to understand this error "-1 HTTP error: connection failed" of the lib, if the .bin file HTTP URL (not HTTPS) is accessible for sure ?
And board works OK with other HTTP server API via WiFi.

Spoiler: Dependencies

B4R 3.50 just updated.
Arduino lib:

 

[peacemaker]

Sketch uses 454724 bytes (43%) of program storage space. Maximum is 1044464 bytes.
Global variables use 42792 bytes (52%) of dynamic memory, leaving 39128 bytes for local variables. Maximum is 81920 bytes.

Is problem that already 52% ? > than 50...

 

[peacemaker]

SOLVED. The lib works as should, if to use the correct URL.
My URL was incorrect after sending it as the parameter, it was encoded as "http:\/\/server.domain\/folder\/test1.bin" after receiving.