None of my devices will pair with the speaker

After trying to pair the speaker with my Windows 10 pc, and failing [pc problem],... the speaker will no long pair with my iPad, or iPhone. The Bluetooth blue light will flash for the allotted time, then quit. I’ve reset the speaker by holding the mute button down as the manual says to do..... still just get a flashing blue light, and my devices will not pair. Any good ideas about how to fix this problem?