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[login to view URL]: Unexpected server response (500) while retrieving PDF

I am using WP Download Manager plugin to serve PDF document previews on my site straight from Dropbox. The plugin protects against download link sharing by changing the document links every 4 hours. However, the links worked well for about 4 hours before returning an error message all the time, as follows:

[login to view URL] v1.9.426 (build: 2558a58d)

Unexpected server response (500) while retrieving PDF

I need help with fixing this, please.

Квалификация: HTML, Javascript, MySQL, PHP, WordPress

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О работодателе:
( 17 отзыв(-а, -ов) ) Cardiff, United Kingdom

ID проекта: #19623054

Поручен:

swayton

Hi, if given access to your server and the server error logs, then I can diagnose and fix this for you today.

$15 USD за 1 день
(0 отзывов(-а))
0.0

6 фрилансеров(-а) в среднем готовы выполнить эту работу за $21

kdwebsolution9

Hello sir, Hope you are doing well. i have 6+ years of experience in WordPress php codeigniter html css mysql javascript bootstrap graphic design website design etc. these job suitable for me Kind Regards, pu Больше

$25 USD за 1 день
(22 отзывов(-а))
4.6
KimHyokJun

Need Web Development or Business Growing? My experiences range from building responsive software design that work well cross-browser to Business Goal. I am glad to provide full solution to you. We Are in House of Web Больше

$25 USD за 1 день
(20 отзывов(-а))
4.1
ashishcompwiz

Hi, I am expert in PHP, Wordpress, HTML, .NET, Android & iOS, with 3+ years in mobile application development field and also almost 5+ years in website designing field. I am a well experienced web and mobile programmi Больше

$25 USD за 1 день
(7 отзывов(-а))
3.9
sushmasain140989

Hi, I read the job details and we are really interested in working on this project for you. We are a development company with a pool of professionals that are ready of help you with all your requirements & always loo Больше

$10 USD за 1 день
(2 отзывов(-а))
2.8
Niravnice

Hello, Greetings for the day!! Thanks for your project invitation and profile consideration. I Have 3+ experience word [login to view URL] per say server response (500) while retrieving PDF.I will do it. I am interested Больше

$25 USD за 1 день
(10 отзывов(-а))
2.6