Zabbix - Cannot connect to [[x.x.x.x]:10050]: [4] Interrupted system call

Development | Software Testing
Tomas Andel
Hi, first of all sorry if post is not in correct topic.

Im pretty n00b in Zabbix and im trying to familiarize with it. I have monitored some hosts in my own network but i now i have to monitorize VPN hosts and one in particular wich i cant comunicate with, so i get the next error :
Get value from agent failed: cannot connect to [[x.x.x.x]:10050]: [4] Interrupted system call

the log of server always show this error: Cannot send list of active checks to [host-i-want-to-monitorize] not found

im getting crazy looking for the answer of this theorema, but i dont have enough experience to get LVL 2 and be better in Zabbix so, someone wants to help me with this little headache problem?
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telnet hostname 10050 from zabbix server
on November 10th, 2020 (5:08 pm)
on November 25th, 2020 (9:57 pm)
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