Hello
Nothing shows at this page:
https://prnt.sc/tdvlh1
For this button, use code given below:
https://prnt.sc/tdvpu4
.unit-template-default.single.single-unit #title a.course_button.button.full {
color:white !important;
background-color:#009bff !important;
border-color:#009bff !important;
}
.unit-template-default.single.single-unit #title a.course_button.button.full:hover{
color:white !important;
background-color:#016eb5 !important;
border-color:#016eb5 !important;
}
For all other problems please deactivate all third-party plugins , Update all files,and goto setting>>.permalinks and saved again.
Thanks,