Can’t access articles. Help? (Newbie here)

Hi! I’m relatively new to using Sci-Hub, I don’t have any problems until now, I’m selecting various articles about eating disorders and cannot seem to access many of them.

When I try to look for an article I see:
-a message saying that the certificate has expired (no idea what that is)
-a message saying that the site is temporarily down or moved into another URL
-the site keeps loading

Should I worry about this? Any suggestion? What can I do to fix this?

I’ll paste some of the references I was looking into (maybe that helps?):

5: Barney JL, Murray HB, Manasse SM, Dochat C, Juarascio AS. Mechanisms and
moderators in mindfulness- and acceptance-based treatments for binge eating
spectrum disorders: A systematic review. Eur Eat Disord Rev. 2019
Jul;27(4):352-380. doi: 10.1002/erv.2673. Epub 2019 Mar 19. PubMed PMID:
30887695; PubMed Central PMCID: PMC6570825.

6: Hay PJ, Touyz S, Claudino AM, Lujic S, Smith CA, Madden S. Inpatient versus
outpatient care, partial hospitalisation and waiting list for people with eating
disorders. Cochrane Database Syst Rev. 2019 Jan 21;1:CD010827. doi:
10.1002/14651858.CD010827.pub2. PubMed PMID: 30663033; PubMed Central PMCID:

7: Dahlenburg SC, Gleaves DH, Hutchinson AD. Treatment outcome research of
enhanced cognitive behaviour therapy for eating disorders: a systematic review
with narrative and meta-analytic synthesis. Eat Disord. 2019
Sep-Oct;27(5):482-502. doi: 10.1080/10640266.2018.1560240. Epub 2019 Jan 11.
PubMed PMID: 30632926.

8: Linardon J, Kothe EJ, Fuller-Tyszkiewicz M. Efficacy of psychotherapy for
bulimia nervosa and binge-eating disorder on self-esteem improvement:
Meta-analysis. Eur Eat Disord Rev. 2019 Mar;27(2):109-123. doi: 10.1002/erv.2662.
Epub 2019 Jan 9. Review. PubMed PMID: 30623519.

9: Hilbert A, Petroff D, Herpertz S, Pietrowsky R, Tuschen-Caffier B, Vocks S,
Schmidt R. Meta-analysis of the efficacy of psychological and medical treatments
for binge-eating disorder. J Consult Clin Psychol. 2019 Jan;87(1):91-105. doi:
10.1037/ccp0000358. PubMed PMID: 30570304.