Log file
org.wikidata.query.rdf.tool.rdf.Munger$BadSubjectException: Unrecognized subjects: [https://arq20.formulasearchengine.com/entity/statement/Q819-b86a346c-c1ab-44da-a227-4d7d8ab60a6d, https://arq20.formulasearchengine.com/entity/Q819, https://arq20.formulasearchengine.com/entity/statement/Q819-d9e0fb14-add7-49b9-95aa-b7c1b037fb35]. Expected only sitelinks and subjects starting with http://arq20.formulasearchengine.com/wiki/Special:EntityData/ and [http://arq20.formulasearchengine.com/entity/], 07:04:37.105 [update 6] WARN org.wikidata.query.rdf.tool.Updater - Contained error syncing. Giving up on Q819, org.wikidata.query.rdf.tool.rdf.Munger$BadSubjectException: Unrecognized subjects: [https://arq20.formulasearchengine.com/entity/Q808, https://arq20.formulasearchengine.com/entity/statement/Q808-2ec7364e-eec9-4e28-84ed-195173b84031, https://arq20.formulasearchengine.com/entity/statement/Q808-bbda7df9-a7a9-4f2f-a7b5-4f0473e2b5a6]. Expected only sitelinks and subjects starting with http://arq20.formulasearchengine.com/wiki/Special:EntityData/ and [http://arq20.formulasearchengine.com/entity/], 07:04:37.172 [update 2] WARN org.wikidata.query.rdf.tool.Updater - Contained error syncing. Giving up on Q808, 07:04:37.285 [update 1] WARN org.wikidata.query.rdf.tool.Updater - Contained error syncing. Giving up on Q815, org.wikidata.query.rdf.tool.rdf.Munger$BadSubjectException: Unrecognized subjects: [https://arq20.formulasearchengine.com/entity/statement/Q815-c22bee46-99fd-4055-bcb9-dd1e1139a03e, https://arq20.formulasearchengine.com/entity/Q815, https://arq20.formulasearchengine.com/entity/statement/Q815-0c242afc-5e72-4495-a1c3-f3e605686e30]. Expected only sitelinks and subjects starting with http://arq20.formulasearchengine.com/wiki/Special:EntityData/ and [http://arq20.formulasearchengine.com/entity/], 07:04:37.300 [update 8] WARN org.wikidata.query.rdf.tool.Updater - Contained error syncing. Giving up on Q804, org.wikidata.query.rdf.tool.rdf.Munger$BadSubjectException: Unrecognized subjects: [https://arq20.formulasearchengine.com/entity/statement/Q804-9ccfc643-a49a-40c1-a2d3-00f05c15a6e8, https://arq20.formulasearchengine.com/entity/statement/Q804-f2894ca5-e865-42c5-aecf-dba1e0f9c03a, https://arq20.formulasearchengine.com/entity/Q804]. Expected only sitelinks and subjects starting with http://arq20.formulasearchengine.com/wiki/Special:EntityData/ and [http://arq20.formulasearchengine.com/entity/], 07:04:37.416 [update 7] WARN org.wikidata.query.rdf.tool.Updater - Contained error syncing. Giving up on Q823, org.wikidata.query.rdf.tool.rdf.Munger$BadSubjectException: Unrecognized subjects: [https://arq20.formulasearchengine.com/entity/statement/Q823-ea61d6b6-bf15-4497-8bdd-10671373b450, https://arq20.formulasearchengine.com/entity/statement/Q823-77f9a13b-97de-429c-a576-44a8517bbde2, https://arq20.formulasearchengine.com/entity/Q823]. Expected only sitelinks and subjects starting with http://arq20.formulasearchengine.com/wiki/Special:EntityData/ and [http://arq20.formulasearchengine.com/entity/]
I noted that this url https://arq20.formulasearchengine.com/entity does not exist but this one does http://arq20.formulasearchengine.com/wiki/Special:EntityData