finally I substituted line 26 approximately of:
Original:
RewriteRule ^cache/jsLanguage/(…_…).js$ index.php?entryPoint=jslang&modulename=app_strings&lang=$1 [L,QSA]
Solution:
RewriteRule /cache/jsLanguage/(…_…).js$ index.php?entryPoint=jslang&modulename=app_s$
I found it here:
Although it was suitecrm 8, it had the same problem