[Resolved] PHP Fatal error: Allowed memory size of 5368709120 bytes exhausted!

<b>Background of the issue: </b>
I was routinely checking my PHP error logs, and I found the following errors.

[07-Aug-2024 03:58:20 UTC] PHP Fatal error: Allowed memory size of 5368709120 bytes exhausted (tried to allocate 262144 bytes) in /home/nuclearmed/htdocs/nuclearmed.org/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/collect/src/Illuminate/Support/Traits/Macroable.php on line 56

[07-Aug-2024 06:31:37 UTC] PHP Fatal error: Allowed memory size of 5368709120 bytes exhausted (tried to allocate 262144 bytes) in /home/nuclearmed/htdocs/nuclearmed.org/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/collect/src/Illuminate/Support/Traits/Macroable.php on line 56

This is Macroable.php from 40 to 60
/**
* Dynamically handle calls to the class.
*
* @param string $method
* @param mixed[] $parameters
* @return mixed
*
* @throws BadMethodCallException
*/
public static function __callStatic($method, $parameters)
{
if (! static::hasMacro($method)) {
throw new BadMethodCallException("Method {$method} does not exist.");
}

if (static::$macros[$method] instanceof Closure) {
return call_user_func_array(Closure::bind(static::$macros[$method], null, static::class), $parameters);
}

return call_user_func_array(static::$macros[$method], $parameters);
}

<b>Symptoms: </b>
PHP Fatal error: Allowed memory size of 5368709120 bytes exhausted!

<b>Questions: </b>
What caused the above errors?
How can I fix this issue?