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Hi Elias, It may be that there is a config issue somewhere. Firstly check that dnsmasq is running ok, in terminal enter sudo systemctl status dnsmasq, you should see some green text within the output that says running.
If thats ok check hostpd is ok as well, sudo systemctl status hostapd.

If there is an issue with either just double check their config files.
If you try the command ip addr you should see the ip address for the hotspot displayed

if not also check that the ip addresses in /etc/dnsmasq.conf and /etc/dhcpcd.conf all start with 192.168.50

Check that wpa_supplicant is not running, enter wpa_cli -i wlan0 status, if it returns information about your wifi like IP numbers, then it is still running. Make sure that in /etc/dhcpcd.conf that the line nohook wpa_supplicant is entered.

if you have no luck, let me know if you are using Jessie or Stretch and if you are using the Internet or non Internet setup.