Ok Steven, thanks for your support. It’s still doesn’t work for me but maybe someone else will have a better luck.
PS. Something new has appeared in ErrorLog.dat:
13.11.2017 21:27:48 - 10.0.16299.0 - 3.2.6526.35650 - System.NullReferenceException: Odkaz na objekt není nastaven na instanci objektu.
v #=qeH0YfUC2OH25ARi32zYaAyyh2qPnjLaqrJtSk4rCOOQ=.#=qR1S3KgdxBbPmDuhMLRHjSA==(#=qNWO_BHhZt7ETm5yViv9mbK6ATyVdZGPFVyKfMJXa66Y= #=qyz_D9aXmV6_hGRSf82uU0Q==)
v #=qeH0YfUC2OH25ARi32zYaAyyh2qPnjLaqrJtSk4rCOOQ=.#=qAuO_nVIFunOqgnJn1jLDmg==()
v #=qeH0YfUC2OH25ARi32zYaAyyh2qPnjLaqrJtSk4rCOOQ=.#=q_rlwjFxWI$5A2YzMTLz$2une2yJKsb$xYAfYkySo6xI=()
v #=qWr8dd$f77KpncWOxDWG5E_a8$3u5MBG1FtMzYFwrv$s=.#=q9jI8g1Te7o2kxlspBKxC9uA2dGuBJX0zlkqZAllW6e0=.#=qAIy8qpic713hzOWXJBOqyZUlg4fvRVkO1CxJivx2ORA=(Boolean #=q4pYY_bWRDkbWR56SCZe16gPYKAgZYSJpiY28BPHcXSg=)