Why is there a 500: mod_fcgid: can't init env request header error?

Question

linux

Hello everyone,
There is a site, when you try to access it from Yandex search results, an error 500 Internal Server Error is displayed
. In the logs, you can see this:

[Tue Nov 29 14:36:06.301966 2016] [fcgid:warn] [pid 2948] [client :59640] mod_fcgid: can't init env request header, referer: https://yandex.ru/clck/jsredir?from=yandex.ru%3Bsitesearch%3Bweb%3B%3B%2Fsite%2Fweb%2Fitem%2Ftitle%2Cpos%2Cp0%2Csource%2Cweb&text=%D1%81%D1%82%D1%80%D0%B0%D1%82%D0%B5%D0%B3%D0%B8%D1%8F%20%D1%8E%D1%80%D0%B8%D1%8F%20%D0%BA%D1%83%D0%B7%D0%B8%D0%BD%D0%B0&uuid=&state=p0xMUgUEWJtcZBIIioDH35SC_MTyxd4MhXjlnkyRLy6n6IuJbT5f9g&data=UlNrNmk5WktYejR0eWJFYk1LdmtxdmVBYThmNGxJS2tsaVl3YTlGMDJPYkZ4c2lpQjFUSS1sMDJvdTBYUXlYMmNkc3NrOUN5S1dFbEk3TW9zaU5pZHk5UnV2Z19MRVl0cUs1SlBKOVhYWVRmc0tIcXFmUm5EejZnMDBRQmpzOWZlWS1NUERDeG5JNA&b64e=2&sign=c3ea4a0a0d2f62e8b8e2e2f348f839da&keyno=0&cst=AiuY0DBWFJ5fN_r-AEszk9vikyRWIr3HV7pRChCE5O_JLlZA3XT0MFf8hyc_hXe9Yto3Wuctd_1GHU7Iw-hXPGeYtlympYmW77xmYXyjRIkgjqsjnxW2xaB-NpmN5r1VzBS4IJsub4SjxBTefcMThbSBs9cFxVR9fh-KDoGS1bJwtBCQQaUee0TcorkdYvSdpjtqItQk_1yhdJnn2zzt8r1SyScy9zQ7rtE5mpqKHSvyfmynRf2BHCM0gsXDR0QY86DH9e4JxHY4d1nOFX9M6-IFf71SHn6w3tmXcFLsHRMt3-XOncni43aeNUhb6Z3fAn-I4n98N_seWG7Mo-3wUI_9H_WaMFL7B2jCgHGqAkeeqLlgdktlzRhSUjgImA-CZOPk0AzozXfXW3gfaHJ4jLqmJX0lrXZgYN-_hyIzfmoO1ZBsgV5DmuPDWOZpt9WamdNh7Zb6NnRLYep1WzKL3SCsBA0yAU_QZGaSWg0rtOa45XcJdPFxnc9x4PwlDXqMMHi-0VAWviI&ref=orjY4mGPRjk5boDnW0uvloSXPXMALegbS65XgydstAStpUf8ra7FY7fc0A6H9gDWNEN1cWBsRsOrpLaBxwyMxNmAyKegyWsmdN2W-Jz1CHFkV_jUHsHrGWygAbyCh127xoTCiOoa4qGkazb6TNfiF6wNLg_mXsy_rMomimUARTZTQ6UceO2nKU46Tyk5Hx0O&l10n=ru
[Tue Nov 29 14:36:06.302000 2016] [fcgid:warn] [pid 2948] [client :59640] mod_fcgid: can't build begin or env request, referer: https://yandex.ru/clck/jsredir?from=yandex.ru%3Bsitesearch%3Bweb%3B%3B%2Fsite%2Fweb%2Fitem%2Ftitle%2Cpos%2Cp0%2Csource%2Cweb&text=%D1%81%D1%82%D1%80%D0%B0%D1%82%D0%B5%D0%B3%D0%B8%D1%8F%20%D1%8E%D1%80%D0%B8%D1%8F%20%D0%BA%D1%83%D0%B7%D0%B8%D0%BD%D0%B0&uuid=&state=p0xMUgUEWJtcZBIIioDH35SC_MTyxd4MhXjlnkyRLy6n6IuJbT5f9g&data=UlNrNmk5WktYejR0eWJFYk1LdmtxdmVBYThmNGxJS2tsaVl3YTlGMDJPYkZ4c2lpQjFUSS1sMDJvdTBYUXlYMmNkc3NrOUN5S1dFbEk3TW9zaU5pZHk5UnV2Z19MRVl0cUs1SlBKOVhYWVRmc0tIcXFmUm5EejZnMDBRQmpzOWZlWS1NUERDeG5JNA&b64e=2&sign=c3ea4a0a0d2f62e8b8e2e2f348f839da&keyno=0&cst=AiuY0DBWFJ5fN_r-AEszk9vikyRWIr3HV7pRChCE5O_JLlZA3XT0MFf8hyc_hXe9Yto3Wuctd_1GHU7Iw-hXPGeYtlympYmW77xmYXyjRIkgjqsjnxW2xaB-NpmN5r1VzBS4IJsub4SjxBTefcMThbSBs9cFxVR9fh-KDoGS1bJwtBCQQaUee0TcorkdYvSdpjtqItQk_1yhdJnn2zzt8r1SyScy9zQ7rtE5mpqKHSvyfmynRf2BHCM0gsXDR0QY86DH9e4JxHY4d1nOFX9M6-IFf71SHn6w3tmXcFLsHRMt3-XOncni43aeNUhb6Z3fAn-I4n98N_seWG7Mo-3wUI_9H_WaMFL7B2jCgHGqAkeeqLlgdktlzRhSUjgImA-CZOPk0AzozXfXW3gfaHJ4jLqmJX0lrXZgYN-_hyIzfmoO1ZBsgV5DmuPDWOZpt9WamdNh7Zb6NnRLYep1WzKL3SCsBA0yAU_QZGaSWg0rtOa45XcJdPFxnc9x4PwlDXqMMHi-0VAWviI&ref=orjY4mGPRjk5boDnW0uvloSXPXMALegbS65XgydstAStpUf8ra7FY7fc0A6H9gDWNEN1cWBsRsOrpLaBxwyMxNmAyKegyWsmdN2W-Jz1CHFkV_jUHsHrGWygAbyCh127xoTCiOoa4qGkazb6TNfiF6wNLg_mXsy_rMomimUARTZTQ6UceO2nKU46Tyk5Hx0O&l10n=ru

I suspect that this is due to a long referer.
Here is a curl request, which causes a 500 error:

curl 'http://premier.region35.ru/gazeta/np991/s27.html' \
-XGET \
-H 'Referer: https://yandex.ru/clck/jsredir?from=yandex.ru%3Bsitesearch%3Bweb%3B%3B%2Fsite%2Fweb%2Fitem%2Ftitle%2Cpos%2Cp0%2Csource%2Cweb&text=%D1%81%D1%82%D1%80%D0%B0%D1%82%D0%B5%D0%B3%D0%B8%D1%8F%20%D1%8E%D1%80%D0%B8%D1%8F%20%D0%BA%D1%83%D0%B7%D0%B8%D0%BD%D0%B0&uuid=&state=p0xMUgUEWJtcZBIIioDH35SC_MTyxd4MhXjlnkyRLy6n6IuJbT5f9g&data=UlNrNmk5WktYejR0eWJFYk1LdmtxdmVBYThmNGxJS2tsaVl3YTlGMDJPYkZ4c2lpQjFUSS1sMDJvdTBYUXlYMmNkc3NrOUN5S1dFbEk3TW9zaU5pZHk5UnV2Z19MRVl0cUs1SlBKOVhYWVRmc0tIcXFmUm5EejZnMDBRQmpzOWZlWS1NUERDeG5JNA&b64e=2&sign=c3ea4a0a0d2f62e8b8e2e2f348f839da&keyno=0&cst=AiuY0DBWFJ5fN_r-AEszk9vikyRWIr3HV7pRChCE5O_JLlZA3XT0MFf8hyc_hXe9Yto3Wuctd_1GHU7Iw-hXPGeYtlympYmW77xmYXyjRIkgjqsjnxW2xaB-NpmN5r1VzBS4IJsub4SjxBTefcMThbSBs9cFxVR9fh-KDoGS1bJwtBCQQaUee0TcorkdYvSdpjtqItQk_1yhdJnn2zzt8r1SyScy9zQ7rtE5mpqKHSvyfmynRf2BHCM0gsXDR0QY86DH9e4JxHY4d1nOFX9M6-IFf71SHn6w3tmXcFLsHRMt3-XOncni43aeNUhb6Z3fAn-I4n98N_seWG7Mo-3wUI_9H_WaMFL7B2jCgHGqAkeeqLlgdktlzRhSUjgImA-CZOPk0AzozXfXW3gfaHJ4jLqmJX0lrXZgYN-_hyIzfmoO1ZBsgV5DmuPDWOZpt9WamdNh7Zb6NnRLYep1WzKL3SCsBA0yAU_QZGaSWg0rtOa45XcJdPFxnc9x4PwlDXqMMHi-0VAWviI&ref=orjY4mGPRjk5boDnW0uvloSXPXMALegbS65XgydstAStpUf8ra7FY7fc0A6H9gDWNEN1cWBsRsOrpLaBxwyMxNmAyKegyWsmdN2W-Jz1CHFkV_jUHsHrGWygAbyCh127xoTCiOoa4qGkazb6TNfiF6wNLg_mXsy_rMomimUARTZTQ6UceO2nKU46Tyk5Hx0O&l10n=ru' \
-H 'Upgrade-Insecure-Requests: 1' \
-H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' \
-H 'Cache-Control: max-age=0' \
-H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/602.2.14 (KHTML, like Gecko) Version/10.0.1 Safari/602.2.14'

Tell me, please, what can be done about this?