Velocity error preventing to access a change request

Caused by: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('\' (code 92)): was expecting comma to separate Object entries
 at [Source: REDACTED (`StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION` disabled); line: 1, column: 285]
 at com.fasterxml.jackson.core.JsonParser._constructReadException(JsonParser.java:2660)
 at com.fasterxml.jackson.core.base.ParserMinimalBase._reportUnexpectedChar(ParserMinimalBase.java:741)
 at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._skipComma(ReaderBasedJsonParser.java:2429)
 at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.nextFieldName(ReaderBasedJsonParser.java:924)
 at com.fasterxml.jackson.databind.deser.std.BaseNodeDeserializer._deserializeContainerNoRecursion(JsonNodeDeserializer.java:539)
 at com.fasterxml.jackson.databind.deser.std.JsonNodeDeserializer.deserialize(JsonNodeDeserializer.java:104)
 at com.fasterxml.jackson.databind.deser.std.JsonNodeDeserializer.deserialize(JsonNodeDeserializer.java:25)
 at com.fasterxml.jackson.databind.deser.DefaultDeserializationContext.readRootValue(DefaultDeserializationContext.java:342)
 at com.fasterxml.jackson.databind.ObjectMapper._readValue(ObjectMapper.java:4893)
 at com.fasterxml.jackson.databind.ObjectMapper.readTree(ObjectMapper.java:3146)
 at org.xwiki.contrib.changerequest.discussions.internal.ChangeRequestDiscussionDiffUtils$UnifiedDiffBlockDeserializer.deserialize(ChangeRequestDiscussionDiffUtils.java:78)
 at org.xwiki.contrib.changerequest.discussions.internal.ChangeRequestDiscussionDiffUtils$UnifiedDiffBlockDeserializer.deserialize(ChangeRequestDiscussionDiffUtils.java:69)
 at com.fasterxml.jackson.databind.deser.DefaultDeserializationContext.readRootValue(DefaultDeserializationContext.java:342)
 at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4917)
 at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3860)
 at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3828)
 at org.xwiki.contrib.changerequest.discussions.internal.ChangeRequestDiscussionDiffUtils.deserialize(ChangeRequestDiscussionDiffUtils.java:200)
 at org.xwiki.contrib.changerequest.discussions.internal.DefaultChangeRequestDiscussionService.getDiffBlockMetadata(DefaultChangeRequestDiscussionService.java:380)