specific intent fails with cannot make request

[tiulimg]

I've found that a specific word returns the error (in "Test" menu). Using the same intent with only some of the entites succeed.
Added a word to with the same entity to the intent, before training it worked but didn't recognized the entity (expected). After training it failed either.
I've also noticed that in other language (english) using this entity doesn't fail the request, but the entity isn't recognized.
Tried to replace the entity with another new entity (same meaning, other form). it helped..

[tiulimg]

Mistakenly I've reused the bad entity, and got again "Cannot make request".
Fixed it and wanted to delete the bad entity. In Train->Entities menu, I've noticed a pencil near the bad entity "edit", when I've clicked it the suggested entity name changed to edit-1. I've saved (succesfully) with it's new name, and run a training again and the request completed successfully (the intent had been recognized successfully but the entity hadn't, maybe because there was only 1 sentence). Tried to create a new entity named "edit" and it succeed and the entity was recognized.

(In the process of training, i've deleted the old edit-1 entity and before the training was finished tested again the input and got "Cannot make request", but after the training was finished it worked fine)