Hi,
Do you have as screenshot of the error ?
Does Chronoforms8 appear in the Components menu on the left side ?
Max, ChronoForms developer
ChronoMyAdmin: Database administration within Joomla, no phpMyAdmin needed.
ChronoMails simplifies Joomla email: newsletters, logging, and custom templates.
please try to install again, you may also try the install from WEB method, search for Chronoforms in the list and hit install
the error shown is from a Joomla file, can you install other extensions ?
Max, ChronoForms developer
ChronoMyAdmin: Database administration within Joomla, no phpMyAdmin needed.
ChronoMails simplifies Joomla email: newsletters, logging, and custom templates.
in the Forms Manager of Chronoforms8 you can click Demo forms as shown below then choose the contact form and click Install Demo form

Max, ChronoForms developer
ChronoMyAdmin: Database administration within Joomla, no phpMyAdmin needed.
ChronoMails simplifies Joomla email: newsletters, logging, and custom templates.
Hi
You can use this CSS in a CSS view:
.errormark{
color:white !important;
}

Please start a new topic if your new question is different to the main topic title, Thank you!
Max, ChronoForms developer
ChronoMyAdmin: Database administration within Joomla, no phpMyAdmin needed.
ChronoMails simplifies Joomla email: newsletters, logging, and custom templates.
here:

Max, ChronoForms developer
ChronoMyAdmin: Database administration within Joomla, no phpMyAdmin needed.
ChronoMails simplifies Joomla email: newsletters, logging, and custom templates.